SMA SI 3324 Installation - Manual (Page 111)

SMA Technologie AG Generator
Installation Guide SI3324/4248-14:SE2406 Page 111
12 Generator
The Sunny Island 3324/4248 is suitable for directly controlling remote-controlled
generators requiring a single start/stop signal. Generators that must be manually
started can also be used. The settings required for integrating a generator into your
system can be found in section 8.5 "Operation with a Generator" (S. 74). The wiring
required to connect the Sunny Island 3324/4248 to different generators can be
found in section 10 "System Examples" (Page 87).
12.1 Load-dependent Generator Request
The load-dependent generator request allows occasional or planned times of high
consumption in the stand-alone grid to be directly supplied by the generator and to
protect the Sunny Island 3324/4248 against overload. Load-dependent generator
requests are only activated when the "24-8 GridConnected" parameter is set to
"GridNone" and the "24-12 PGenActiv" parameter is set to "ON".
As long as the level of generator current allows this, the Sunny Island 3324/4248
will also use this to charge the batteries, even when it has requested the generator
for the purposes of feeding a heavy load (cf. section 8.5.2 "Setting the Output
Current Limit" (Page 77)).
The following five parameters can be set under the menu branch "Load-dependent
generator request":
1. "24-12 PGenActiv" Parameter
If this parameter is set to "On", then load-dependent generator requests and
temperature-dependent generator requests are activated (see section 12.2
"Temperature-dependent Generator Request" (S. 113)).
2. "24-13 PGenTAve" Parameter
This parameter defines the average time for power calculations determining whether
the generator is to be switched on or off.
When making settings for load-dependent generator requests, pay attention
to the maximum generator current defined under the "24-2 AmpacGenMax"
parameter (see section 8.5.2 "Setting the Output Current Limit" (Page 77)). If
the power defined for load-dependent generator requests lies above the limit
defined in "24-2 AmpacGenMax", then the Sunny Island 3324/4248 will start
the generator but will not feed the stand-alone grid.